This received a lot of discussion a year or so ago. Barney came up with the
suggestion that they are there to add a very slight bow to the rocker shaft,
to keep it tight in the four pedestals. Shafts from set-ups without the
shims do seem to show marked wear patterns where the shaft passes through
the pedestals. So, if you are worried about the possibility of your shaft
wearing where it passes through the pedestal, (which could account for a
small part of the valve train noise) then fit the shims.
Lawrie
British Sportscar Center
-----Original Message-----
From: Calvin Krug <ckrug@laf.cioe.com>
To: mgs@autox.team.net <mgs@autox.team.net>
Date: Thursday, March 11, 1999 5:09 PM
Subject: Rocker stand shims
>I happened to notice while disassembling the head on my MGB that there are
>no shims under the two middle rocker stands. Is this a big deal? I'm a
>little concerned that if it ran without them in place, it might throw
>things out of alignment if I put them in. What's the concensus on this?
>
>Calvin Krug
>
>
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